Marking device.



T. McGRATH.

MARKING DEVICE. APPLICATION FILED JAN-31. i916.

1,256,342. Patented Feb. 12,1918.

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1 LLIHIOIVIIAS McGRATI-I, OF PROVIDENCE, RHODE ISLAND.

MARKING DEVICE.

Specification of Letters Patent.

Patented Feb. 12, 1918.

Application filed January 31, 1916. Serial No. 75,252.

To all whom it may concern:

Be it known that I, Trroiiras MoGna'ri-r, a citizen of the United. States, and resident of the city of Providence, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Marking Devices, of which the following is a specification.

This invention relates to devices for marking metal ornaments, such as finger rings and other articles of jewelry, and the invention has for its object to provide a machine having means for supporting the work, and a rotatable character carrying member adapted to impress its characters onto the work by a rolling action.

The invention further consists in the provision of means whereby the work support ing arbor and the character carrying member may receive relative adjustment to accommodate work of different thicknesses.

The invention further consists in constructing the character carrying member in the form of a chuck having a pair of rela tively yield-able jaws adapted to receive the different characters which are preferably in the form of short shanked hardened faced type, the chuck being provided with means whereby these jaws may be closed onto the type to hold them while performing their work.

With these and other objects in view, the invention consists of certain novel features of construction, as will be more fully described, and particularly pointed out in the appended claim.

In the accompanying drawings:

Figure 1-- is a front view of my improved metal marking machine.

Fig. 2 is a side elevation of this machine showing a portion of the same in section.

Fig. 3- is a sectional face view of the chuck member which carries the type or marking characters.

Fig. 4- isa sectional side elevation of the chuck member.

Fig. 5- is a perspective view of one of the type.

Fig. 6-is a perspective view showinga ring marked.

Referring to the drawings 10 designates the frame or standard which supports the operating mechanism. In the upper portion of this standard is rotatably mounted the shaft 11 having a collar 12 near its front end which runs against the front face of the frame. On the short extension 15 of this shaft beyond the collar, is mounted my improved character carrying member 13 which is preferably made in the form of a chuck. This chuck is provided. with a bore 14 for the reception of the outer end of the shaft on which it is secured against relative rotation, by the key 16. The outer face 17 of the laterally extending portion 23 of this chuck, is formed on the arc of a circle and is of a width to receive a plurality of marking, or character carrying type 18. The edge of this chuck is recessed and the side walls of the recess under-cut as at 19, see Fig. 4-, and a slot 20 is formed from the recess into the body of the chuck, thereby rendcring the jaw 21 slightly yieldable. A thumb screw 22 is threaded through this cut into the inner jaw, whereby the jaws may be adjusted relatively and set up onto the type 18 to bind them firmly in this re cess. These type are preferably formed separate and of hardened steel with the desired letters or characters embossed on their separate working faces, and the shank end of these type is formed of a dove-tail shape so that they may be slid into the under-cut groove 19 in the chuck to rest against the stop pin 24 after which the screw 22 is set up, binding them firmly in position,yet rendering them readily removable to be replaced with other characters as often as desired. A washer 25 is secured to the end of the shaft by the screw 26 to hold this chuck in position thereon. To the opposite end of this shaft 11 is keyed a crank handle 27 by which the chuck may be caused to rotate and roll its characters into the work a.

In order to support this work beneath the face of the chuck carrying the characters, I have provided an arbor 28 which has mounted on it the roller sleeve 29, held in position thereon by collar 31 and screw 30. This arbor is provided with a shank portion 32 which passes through the plate 33 and through the elongated bore 34 in the frame, to the back side of this frame, where it is secured by a binding nut 35 threaded on the end of the shank. This arbor may be adjusted relative to the chuck, by means of the adjusting screw 36 threaded through the block 37, the latter having a shank 38 extending into an opening 39 in the frame to receive it.

By this construction when it is desired to mark a thinner set of rings the nut 35' the whole tightly in position. The adjust- 7 ing screw 36 also serves to support this plate 33 and arbor 28 during the marking process.

By my improved construction, if any word, monogram or number of characters is desired to be impressed upon a ring, these characters formed on the type are inserted into the chuck and the thumb screw set up binding them firmly in position. The ring or other metal ornament to receive the marking is now placed upon the arbor 28, then the operating handle 27 is rotated causing the characters in the chuck to roll withsutH- cient pressure, to be impressed into the surface of the work which leaves a' clean cut A marking device comprising a frame, a

work-supporting arbor having one end free over whlch the workmay be readlly positioned and removed, a'character-cari ying chuck rotatably mounted in said frame above said arbor and adapted to impress its arbor with a rolling pressure.

In testimonv whereof I affix my signature in presence of two witnesses.

V THOMAS MoGRATH. Witnesses: v

H. F RILEY, G. RYDBERG.

Copiesof this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

. c Washington, I). C.

characters into the work supported on said 

